THOUSAND OAKS, Calif. -- Los Angeles Rams safety T.J. McDonald has been charged with one misdemeanor count of driving under the influence of drugs, stemming from McDonald's arrest after a traffic accident in May, the Los Angeles City Attorney's Office said Friday.

McDonald faces an Oct. 7 arraignment and could face a maximum penalty of six months in county jail and a $1,000 fine if found guilty of the misdemeanor.

The former USC star is expected to start against the Seattle Seahawks on Sunday, which would mark the Rams' first regular-season game back at Los Angeles Coliseum. But McDonald, 25, could eventually face discipline by the Rams or the NFL.

The charges were first reported by the Orange County Register.

In a statement, the Rams said: "We are aware the city attorney filed charges today against T.J. McDonald stemming from his arrest in May. As this is an ongoing legal matter, it would be inappropriate to comment further at this time."

McDonald, the son of 13-year NFL safety Tim McDonald, was arrested May 10 after police said a car he was driving hit a parked car in Woodland Hills, California. He was then arrested under suspicion of driving under the influence of a substance other than alcohol.

McDonald, who missed the last four games of the 2015 season because of a shoulder injury, did not participate in organized team activities during the offseason, but he reported for training camp in July and played in Week 1.

Asked if he was worried about McDonald during the summer, Rams coach Jeff Fisher said: "We were concerned with respect to the issues he was working through. But we stood behind him the whole time, knowing that he would come back."